FIG 3. Coronal T2-weighted MR images (3000/100/3; section thickness, 3 mm; intersection gap, 0.9 mm; matrix, 256 x 231; field of view, 20 cm) shows the substantia innominata in five subjects (arrows, A–E).

A, Image in a 37-year-old healthy female control subject.

B, Image in a 70-year-old healthy male control subject shows thinning of the substantia innominata.

C, Image in a 67-year-old man with AD shows prominent atrophy of the substantia innominata.

D, Image in a 74-year-old man with vascular dementia shows prominent atrophy of the substantia innominata.

E, Image in a 64-year-old woman with frontotemporal dementia shows prominent atrophy of the substantia innominata.